Finding the Fourth Proportional to 8,700.48, 12,006.72 and 4,974.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,700.48 : 12,006.72 = 4,974.72 : x
2. Step 2: Convert to fraction form
   8,700.48/12,006.72 = 4,974.72/x
3. Step 3: Cross multiply
   8,700.48x = 12,006.72 × 4,974.72
4. Step 4: Simplify right side
   8,700.48x = 59,730,070.12
5. Step 5: Solve for x
   x = 59,730,070.12/8,700.48
6. Step 6: Final answer
   x = 6,865.15